Owners of iOS devices running the latest version of Apple's mobile operating system awoke to a display error in iOS 7's calendar app caused by the switch to daylight saving time.

iOS 7's calendar application displays the "current time" line offset by one hour.Thanks to AppleInsider readers Valentijn and Andrea

Several AppleInsider readers have reported the line indicating the current time is displaced by one hour in the calendar app — for example, at 12:15 p.m., the calendar app draws the "current time" line in the slot for 1:15 p.m., despite displaying the correct time beside the line and in the system notification bar.

The bug reportedly does not affect scheduled alarms or calendar events, the times for which are adjusted properly.

Time zone support is a recurring issue for Apple's software and operating systems. In 2010, iOS 4 contained a bug that did not properly shift alarm schedules when Daylight Savings Time ended, causing some European iPhone owners to miss appointments or wake up late for work, while Australians were woken up early.

In 2011, another iOS 4 bug caused non-recurring alarms to be disabled when clocks ticked over to January 1, 2011. Apple eventually fixed both issues.

I never change the clock in my car, consequently it's only ever wrong for part of the year. It's too complicated to change. It's a complete nuisance this moving clocks back and forward, never actually seen any reason why, apparently it dates back to farmers milking cows or something.

That's completely opposite. DST is because people stay awake at night more than they do in the day, so you shift the clock so you get more daylight. People stay up till say midnight, which is sunset + ~6 hours. You don't wake up at sunrise - 6 hours = ~1 AM.

Farmers dislike DST because their day is set by the sun, not the clock. I guess people like to bash farmers as hicks when they don't know what they're talking about.